0p:string.h

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      string.h - string operations
      
      #include <string.h>

Contents 1 DESCRIPTION 2 APPLICATION USAGE 3 RATIONALE 4 FUTURE DIRECTIONS 5 RELATED 6 COPYRIGHT 7 CATEGORY

DESCRIPTION

      Some  of the functionality described on this reference page extends the ISO C standard. Applications shall define
      the appropriate feature test macro (see the System Interfaces volume of IEEE Std 1003.1-2001,  Section  2.2,  The
      Compilation Environment) to enable the visibility of these symbols in this header.
 
      The <string.h> header shall define the following:
 
      NULL   Null pointer constant.
 
      size_t As described in <stddef.h> .
 
      The following shall be declared as functions and may also be defined as macros. Function prototypes shall be pro-
      vided.
 
             void    *memccpy(void *restrict, const void *restrict, int, size_t);
 
             void    *memchr(const void *, int, size_t);
             int      memcmp(const void *, const void *, size_t);
             void    *memcpy(void *restrict, const void *restrict, size_t);
             void    *memmove(void *, const void *, size_t);
             void    *memset(void *, int, size_t);
             char    *strcat(char *restrict, const char *restrict);
             char    *strchr(const char *, int);
             int      strcmp(const char *, const char *);
             int      strcoll(const char *, const char *);
             char    *strcpy(char *restrict, const char *restrict);
             size_t   strcspn(const char *, const char *);
 
             char    *strdup(const char *);
 
             char    *strerror(int);
 
             int     *strerror_r(int, char *, size_t);
 
             size_t   strlen(const char *);
             char    *strncat(char *restrict, const char *restrict, size_t);
             int      strncmp(const char *, const char *, size_t);
             char    *strncpy(char *restrict, const char *restrict, size_t);
             char    *strpbrk(const char *, const char *);
             char    *strrchr(const char *, int);
             size_t   strspn(const char *, const char *);
             char    *strstr(const char *, const char *);
             char    *strtok(char *restrict, const char *restrict);
 
             char    *strtok_r(char *, const char *, char **);
 
             size_t   strxfrm(char *restrict, const char *restrict, size_t);
 
      Inclusion of the <string.h> header may also make visible all symbols from <stddef.h>.
 
      The following sections are informative.

APPLICATION USAGE

      None.

RATIONALE

      None.

FUTURE DIRECTIONS

      None.

RELATED

      <stddef.h> , <sys/types.h> , the System Interfaces volume of IEEE Std 1003.1-2001, memccpy(), memchr(), memcmp(),
      memcpy(),  memmove(),  memset(),  strcat(),  strchr(),  strcmp(),  strcoll(), strcpy(), strcspn(), strdup(), str-
      error(), strlen(), strncat(), strncmp(), strncpy(), strpbrk(), strrchr(), strspn(), strstr(), strtok(), strxfrm()

COPYRIGHT

      Portions  of  this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Stan-
      dard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base  Specifica-
      tions Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open
      Group. In the event of any discrepancy between this version and the original IEEE and The  Open  Group  Standard,
      the  original  IEEE  and  The  Open Group Standard is the referee document. The original Standard can be obtained
      online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group 2003 <string.h>(P)

CATEGORY